From: Emmanuel Grumbach Date: Fri, 15 Jan 2021 11:05:55 +0000 (+0200) Subject: iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=98c7d21f957b10d9c07a3a60a3a5a8f326a197e5;p=linux.git iwlwifi: pcie: add a NULL check in iwl_pcie_txq_unmap I hit a NULL pointer exception in this function when the init flow went really bad. Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/iwlwifi.20210115130252.2e8da9f2c132.I0234d4b8ddaf70aaa5028a20c863255e05bc1f84@changeid --- diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c index 5dda0015522dd..83f4964f3cb29 100644 --- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c @@ -201,6 +201,11 @@ static void iwl_pcie_txq_unmap(struct iwl_trans *trans, int txq_id) struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_txq *txq = trans->txqs.txq[txq_id]; + if (!txq) { + IWL_ERR(trans, "Trying to free a queue that wasn't allocated?\n"); + return; + } + spin_lock_bh(&txq->lock); while (txq->write_ptr != txq->read_ptr) { IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n",